LB1821 View Datasheet(PDF) - SANYO -> Panasonic

Part Name

Description

Manufacturer

LB1821

Power Brushless Motor Pre-Driver IC for OA Equipment

SANYO -> Panasonic 

Continued from preceding page.

Pin No.

Pin

LB1821M

Functions

33

VREG

7-V shunt regulator output

Equivalent circuit

34

CR

PWM oscillator frequency setting

Reference signal oscillator connection. This oscillator is

used by the motor constraint detection circuit, the clock

35

CROCK

disconnection protection circuit, and other circuits.

A protection operation time of about 2.1 seconds can be set

up by connecting a capacitor of about 0.047 µF between

this pin and ground.

Setting for the charge current used for the VCO circuit C pin

36

R

Connect a resistor between this pin and ground. The value

of that resistor must not be lower than 2.7 kΩ.

VCO oscillator connection. This pin sets the VCO

frequency.

37

C

Connect a capacitor between this pin and ground.

Set the value of the capacitor so that the oscillator

frequency does not exceed 1 MHz.

Continued on next page.

No. 5686-15/16

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